$width:1090px;
.big-ads{
    width: 100%;
    height: 1458px;
    margin-top: 20px;
    position: relative;
}
.big-ads-top{
    width: 464px;
    margin: 0 auto;
    border: 1px solid #666;
}
.big-ads-top .abs-now{
    background: #666;
    color: #6e6e6e
}
.big-ads-top li{
    float: left;
    height: 44px;
    width: 232px;
    line-height: 44px;
    font-size: 22px;
    text-align: center;
    color: #333;
    background: #f7f7f7;
    position: relative;
    cursor: pointer;
}
 .abs-now:after{
    content: '';
    display: block;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 10px;
    left: 50%;
    position: absolute;
    margin-left: -11px;
    border-color: #666 #fff #fff #fff;
}
.big-ads-content{
    width: $width;
    margin: 20px auto 0;
}
.big-ads-pic{
    width: 525px;
    height: 212px;
    float: left;
    display: block;
    margin: 0 20px 20px 0;
}
.big-ads-pic img{
    display: block;
}